Transport in Plants Test

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Transport in Plants Test - 15

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Weekly Quiz Competition

Question 1
1 / -0

Correct pathway of water movement in plant roots is

A
Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Xylem $$\longrightarrow$$ Pericycle

B
Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem

C
Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Pericycle$$\longrightarrow$$ Xylem

D
Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem

Solution

Water will be absorbed by root hairs when the external medium is hypotonic. This kind of absorption takes place passively. The water can easily move from the region of higher concentration to the low concentration without expenditure of energy by facilitated diffusion through the aquaporins. Water is absorbed by the root hair from the soil. It passes the epidermis, cortex, endodermis, casparian strip and pericycle and protoxylem and metaxylem.
So, the correct answer is option C.
Question 2
1 / -0

The initial stage of water absorption by root cells is:

A
Absorption

B
Diffusion

C
Osmosis

D
Imbibition

Solution

Answer is option D i.e. "Imbibition
The water molecules in the soil are attracted towards the root cells, as a result the water molecules get adsorbed onto the surface of dry root cells. The adsorption process in living cells is called as Imbibition phenomenon. This is followed by second step which is absorption where water molecules cross the cell membrane to reach the cytoplasm.
Question 3
1 / -0

Apoplast is located

A
Outside the plasma membrane

B
In the entire cytosol

C
inside the plasma membrane

D
In the plastidial content

Solution

In the Apoplast pathway water cannot enter the protoplasm.
It travels through the space between the cell wall and cell membrane and intercellular spaces.
So the correct answer is 'Outside the plasma membrane'.
Question 4
1 / -0

Water potential of soil is quantified in terms of

A
Pressure

B
Volume

C
Molar concentration

D
Molal concentration

Solution

Water potential of the soil is measured in terms of pressure potential.
It is created due to water present on the surface of the soil and also considering atmospheric pressure. If the soil is saturated then the pressure potential is taken as positive and it is taken zero in case of unsaturated soil.
So the correct answer is 'Pressure'.
Question 5
1 / -0

The movement of solvent molecules into the region of higher solute concentration through semipermeable membrane is called

A
Imbibition

B
Diffusion

C
Osmosis

D
Plasmolysis

Solution

a) The process of adsorption of water by solid particles of a substance without forming a solution is called imbibition. The water potential gradient between the absorbent and the liquid imbibed is essential for imbibition.
b) Diffusion is random movement of molecules from the region of higher concentration to the lower concentration. It allows the gaseous exchange during transpiration from the stomata.
c) Osmosis is the process of diffusion of molecules from the region of higher concentration to the lower concentration through a semipermeable membrane. The cells absorbs water by the process of endosmosis from its surrounding and water exits by the process of exosmosis. On absorption of water the turgor pressure inside the cells increases. It helps to maintain the shape of the cell. It helps in the growth, development, mechanical support and prevents wilting.
d) Plasmolysis is the shrinking of the protoplasm as a result of water loss from osmosis when a cell comes in contact with a hypertonic solution.
So, the correct answer is option C.
Question 6
1 / -0

Chambers I and II are separated by a semipermeable membrane. Study the given figure and choose the right option

A
Chamber I has higher water potential and water will move from I to II.

B
Chamber II has lower solute potential and water will move from I to II.

C
Chamber I has higher solute potential and water will move from II to I.

D
Chamber II has lower water potential and water will move from II to I.

Solution

Water potential is the ability of water molecules to move freely in solution. Water potential of pure water is zero. It decreases as the solute concentration increases. Chambers I and II are separated by a semipermeable membrane. In chamber II, there are more solute particles than in chamber I. Hence, chamber I has higher water potential than chamber II. In this, water will move from lower concentration of solute (chamber I) to higher concentration of solute (chamber II).
Thus, the correct answer is option A.
Question 7
1 / -0

The two chambers, A and B, containing solution are separated by a semipermeable membrane.
The solution of which chamber has a lower solute potential?

A
A

B
B

C
Both has the same solute potential

D
Cannot be determined
Solution
- Solute potential is also called as osmotic potential. It is the potential of a solution that allows the water to enter in it by diffusion or osmosis due to the presence of the solute material. Since solution B has lower solute concentration as compared to that in solution A, solution B has lower solute potential.
Thus, the correct answer is 'B.'
Question 8
1 / -0

When a flaccid cell is placed in water

A
Its OP increses

B
Its TP increses

C
Its DPP increses

D
All of these

Solution

OP is Osmotic pressure which is the hydrostatic pressure developed in a solution when it is separated from pure solvent by a semi permeable membrane in a rigid vessel. When the flaccid cell is placed in water then the pure solvent is water, the cytoplasm of the cell is solution and the sell membrane is semi permeable membrane.
So, the correct option is 'Its OP incncreases'
Question 9
1 / -0

Loss of water in the form of vapours from the living tissues of aerial plant parts is called _________________.

A
Transpiration

B
Guttation

C
Bleeding

D
Precipitation

Solution

The loss of water in the vapour form from the exposed parts of a plant is called transpiration. The loss of water due to transpiration is quite high. It is 2 litre per day in sunflower, 36−45 litres in apple and upto 1 tonne per day in elm tree.
Question 10
1 / -0

if the number of solute particles in chamber A is increased, then which of the following statement is correct?

A
Rate of$$ H_2$$O movement through semipemeble membrane is decreased

B
water molecules in chamber `A` attain more free energy

C
Water molecules in chamber `B` show more or increased rate of movement

D
Water potential of chamber`B` is increased

Solution

Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane(SPM) from a less concentrated solution into a more concentrated one. If the number of solute practices in chamber A is increased, then it results in an increase in the concentration of the solution in chamber A.It means now chamber B is less concentrated than chamber A because solute molecules are increased in chamber A.Here the solvent is water so according to osmosis phenomenon the water molecules in chamber 'B' show more or increased rate of movement when the number of solvent particles in chamber A is increased.
So, the correct answer is 'Option C'.

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Transport in Plants Test - 15

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Transport in Plants Test - 15

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SHARING IS CARING

Question 1

Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Xylem $$\longrightarrow$$ Pericycle

Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem

Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Pericycle$$\longrightarrow$$ Xylem

Soil water $$\longrightarrow$$ Root hair cell $$\longrightarrow$$ Cortical cells $$\longrightarrow$$ Pericycle $$\longrightarrow$$ Passage cells $$\longrightarrow$$ Xylem

Solution

Question 2

Absorption

Diffusion

Osmosis

Imbibition

Solution

Question 3

Outside the plasma membrane

In the entire cytosol

inside the plasma membrane

In the plastidial content

Solution

Question 4

Pressure

Volume

Molar concentration

Molal concentration

Solution

Question 5

Imbibition

Diffusion

Osmosis

Plasmolysis

Solution

Question 6

Chamber I has higher water potential and water will move from I to II.

Chamber II has lower solute potential and water will move from I to II.

Chamber I has higher solute potential and water will move from II to I.

Chamber II has lower water potential and water will move from II to I.

Solution

Question 7

A

B

Both has the same solute potential

Cannot be determined

Solution

Question 8

Its OP increses

Its TP increses

Its DPP increses

All of these

Solution

Question 9

Transpiration

Guttation

Bleeding

Precipitation

Solution

Question 10

Rate of$$ H_2$$O movement through semipemeble membrane is decreased

water molecules in chamber `A` attain more free energy

Water molecules in chamber `B` show more or increased rate of movement

Water potential of chamber`B` is increased

Solution

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